|
|
PDF ADM1176 Data sheet ( Hoja de datos )
| Número de pieza | ADM1176 | |
| Descripción | Hot Swap Controller and I2C Power Monitor | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de ADM1176 (archivo pdf) en la parte inferior de esta página. Total 25 Páginas | ||
|
No Preview Available !
Data Sheet
FEATURES
Allows safe board insertion and removal from a live backplane
Controls supply voltages from 3.15 V to 16.5 V
Precision current sense amplifier
Precision voltage input
12-bit ADC for current and voltage readback
Charge-pumped gate drive for external N-channel FET
Adjustable analog current limit with circuit breaker
±3% accurate hot swap current limit level
Fast response limits peak fault current
Automatic retry or latch-off on current fault
Programmable hot swap timing via TIMER pin
Active high ON pin
I2C fast mode-compliant interface (400 kHz maximum)
2 address pins allow 16 devices on the same bus
10-lead MSOP
APPLICATIONS
Power monitoring/power budgeting
Central office equipment
Telecommunications and data communications equipment
PCs/servers
GENERAL DESCRIPTION
The ADM1176 is an integrated hot swap controller that offers
digital current and voltage monitoring via an on-chip 12-bit
analog-to-digital converter (ADC), communicated through an
I2C® interface.
An internal current sense amplifier measures voltage across the
sense resistor in the power path via the VCC pin and the SENSE pin.
The ADM1176 limits the current through this resistor by control-
ling the gate voltage (via the GATE pin) of an external N-
channel FET in the power path. The voltage across the sense
resistor (and therefore the inrush current) is kept below a preset
maximum.
The ADM1176 protects the external FET by limiting the time that
the maximum current runs through it. This current limit period
is set by the value of the capacitor attached to the TIMER pin.
Additionally, the device provides protection from overcurrent
events that may occur after the hot swap event is complete. In
the case of a short-circuit event, the current in the sense resistor
exceeds an overcurrent trip threshold, and the FET is switched
off immediately by pulling down the GATE pin.
Hot Swap Controller and
I2C Power Monitor
ADM1176
FUNCTIONAL BLOCK DIAGRAM
ADM1176
MUX
VCC
V
0
SENSE
I
A1
CURRENT
SENSE
AMPLIFIER
12-BIT
SDA
ADC
I2C SCL
A1
A0
ON
1.3V
UNDERVOLTAGE
COMPARATOR
GND
FET DRIVE
CONTROLLER
TIMER
Figure 1.
GATE
3.15V TO 16.5V
RSENSE N-CHANNEL FET
VCC SENSE
GATE
ADM1176
ON SDA
SCL
CONTROLLER
P = VI
SDA
SCL
TIMER
GND
A1
A0
Figure 2. Applications Diagram
A 12-bit ADC can measure the current seen in the sense
resistor, as well as the supply voltage on the VCC pin. An
industry-standard I2C interface allows a controller to read
current and voltage data from the ADC. Measurements can be
initiated by an I2C command. Alternatively, the ADC can run
continuously, and the user can read the latest conversion data
whenever it is required. Up to 16 unique I2C addresses can be
created, depending on how the A0 and A1 pins are connected.
The ADM1176 is packaged in a 10-lead MSOP.
Rev. C
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113 ©2006–2012 Analog Devices, Inc. All rights reserved.
1 page  
ADM1176
Parameter
MONITORING ACCURACY1
Current Sense Absolute Accuracy
0°C to +70°C
0°C to +85°C
−40°C to +85°C
VSENSE for ADC Full Scale2
Voltage Sense Accuracy
0°C to +70°C
0°C to +85°C
−40°C to +85°C
VCC for ADC Full Scale2
Low Range (VRANGE = 1)
High Range (VRANGE = 0)
I2C TIMING
Low Level Input Voltage, VIL
High Level Input Voltage, VIH
Low Level Output Voltage on SDA, VOL
Output Fall Time on SDA from VIHMIN to VILMAX
Maximum Width of Spikes Suppressed by
Input Filtering on SDA and SCL Pins
Input Current, II, on SDA/SCL When Not
Driving a Logic Low Output
Input Capacitance on SDA/SCL
SCL Clock Frequency, fSCL
Min Typ
−1.45
−1.8
−2.8
−5.7
−1.5
−1.8
−2.95
−6.1
−1.95
−2.45
−3.85
−6.7
−0.85
−0.9
−0.85
−0.9
−0.9
−1.15
105.84
6.65
26.52
0.7 VBUS
20 + 0.1 CBUS
50
−10
5
Max Unit Conditions
Data Sheet
+1.45
+1.8
+2.8
+5.7
+1.5
+1.8
+2.95
+6.1
+1.95
+2.45
+3.85
+6.7
%
%
%
%
%
%
%
%
%
%
%
%
mV
+0.85
+0.9
+0.85
+0.9
+0.9
+1.15
%
%
%
%
%
%
VSENSE = 75 mV
VSENSE = 50 mV
VSENSE = 25 mV
VSENSE = 12.5 mV
VSENSE = 75 mV
VSENSE = 50 mV
VSENSE = 25 mV
VSENSE = 12.5 mV
VSENSE = 75 mV
VSENSE = 50 mV
VSENSE = 25 mV
VSENSE = 12.5 mV
VCC = 3.0 V to 5.5 V (low range)
VCC = 10.8 V to 16.5 V (high range)
VCC = 3.0 V to 5.5 V (low range)
VCC = 10.8 V to 16.5 V (high range)
VCC = 3.0 V to 5.5 V (low range)
VCC = 10.8 V to 16.5 V (high range)
V
V
0.3 VBUS
0.4
250
250
V
V
V
ns
ns
+10 µA
pF
400 kHz
VBUS = 3.0 V to 5.5 V
VBUS = 3.0 V to 5.5 V
IOL = 3 mA
CBUS = bus capacitance from SDA to GND
Rev. C | Page 4 of 24
5 Page 
ADM1176
0
–1
–2
–3
–4
–5
–6
0 2 4 6 8 10 12 14 16 18
VCC (V)
Figure 16. Timer Pull-Up Current (Initial Cycle) vs. Supply Voltage
0
–10
–20
–30
–40
–50
–60
–70
–80
0 2 4 6 8 10 12 14 16 18
VCC (V)
Figure 17. Timer Pull-Up Current (Circuit Breaker Delay) vs. Supply Voltage
3.0
2.5
2.0
1.5
1.0
0.5
0
0 2 4 6 8 10 12 14 16 18
VCC (V)
Figure 18. Timer Pull-Down Current (Cooldown/FET Off Cycle) vs. Supply Voltage
Data Sheet
0
–1
–2
–3
–4
–5
–6
–40
–20
0 20 40
TEMPERATURE (°C)
60
80
Figure 19. Timer Pull-Up Current (Initial Cycle) vs. Temperature
0
–10
–20
–30
–40
–50
–60
–70
–80
–40
–20
0 20 40
TEMPERATURE (°C)
60
80
Figure 20. Timer Pull-Up Current (Circuit Breaker Delay) vs. Temperature
3.0
2.5
2.0
1.5
1.0
0.5
0
–40 –20
0 20 40
TEMPERATURE (°C)
60
80
Figure 21. Timer Pull-Down Current (Cooldown/FET Off Cycle) vs. Temperature
Rev. C | Page 10 of 24
11 Page | ||
| Páginas | Total 25 Páginas | |
| PDF Descargar | [ Datasheet ADM1176.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| ADM1170 | Hot Swap Controller | Analog Devices |
| ADM1171 | Hot Swap Controller | Analog Devices |
| ADM1172 | Hot Swap Controller | Analog Devices |
| ADM1173 | 2.7V to 16.5V Hot Swap Controller | Analog Devices |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |